Editor subscribes to buffer-path-change events on edit sessions, not buffers directly

spec/app/editor-spec.coffee

@@ -91,18 +91,6 @@ describe "Editor", ->
       editor.attachToDom()
       expect(editor).toMatchSelector ":has(:focus)"
 
-    it "unsubscribes from the buffer when it is removed from the dom", ->
-      editSession = rootView.project.open('sample.txt')
-      previousSubscriptionCount = editSession.buffer.subscriptionCount()
-      editor.attachToDom()
-      editor.edit(editSession)
-
-      expect(editSession.buffer.subscriptionCount()).toBeGreaterThan previousSubscriptionCount
-      expect($('.editor')).toExist()
-      editor.remove()
-      expect(editSession.buffer.subscriptionCount()).toBeLessThan previousSubscriptionCount
-      expect($('.editor')).not.toExist()
-
   describe "when the editor recieves focus", ->
     it "focuses the hidden input", ->
       editor.attachToDom()
@@ -192,18 +180,6 @@ describe "Editor", ->
         editor.edit(previousEditSession)
         expect(editor.activeEditSession).toBe previousEditSession
 
-    it "unsubscribes from the previously assigned buffer", ->
-      previousEditSession = editor.activeEditSession
-      previousSubscriptionCount = previousEditSession.buffer.subscriptionCount()
-      editor.edit(otherEditSession)
-      expect(previousEditSession.buffer.subscriptionCount()).toBe previousSubscriptionCount - 1
-
-      editor.edit(previousEditSession)
-      expect(previousEditSession.buffer.subscriptionCount()).toBe previousSubscriptionCount
-
-      editor.edit(otherEditSession)
-      expect(previousEditSession.buffer.subscriptionCount()).toBe previousSubscriptionCount - 1
-
     it "handles buffer manipulation correctly after switching to a new edit session", ->
       editor.attachToDom()
       editor.insertText("abc\n")

src/app/edit-session.coffee

@@ -41,6 +41,9 @@ class EditSession
     @selections = []
     @addCursorAtScreenPosition([0, 0])
 
+    @buffer.on "path-change.edit-session-#{@id}", =>
+      @trigger 'buffer-path-change'
+
     @buffer.on "change.edit-session-#{@id}", (e) =>
       anchor.handleBufferChange(e) for anchor in @getAnchors()
       @mergeCursors()

src/app/editor.coffee

@@ -385,10 +385,9 @@ class Editor extends View
 
     @unsubscribeFromBuffer() if @buffer
     @buffer = @activeEditSession.buffer
-    @buffer.on "path-change.editor#{@id}", => @trigger 'editor-path-change'
 
     @trigger 'editor-path-change'
-
+    @activeEditSession.on "buffer-path-change", => @trigger 'editor-path-change'
     @renderWhenAttached()
 
   activateEditSessionForPath: (path) ->